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Mention that libssl-dev is required for building bootimage

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Philipp Oppermann
2018-03-23 14:32:50 +01:00
parent 9a108026e6
commit 5f195a869c
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blog/content/second-edition/posts/02-minimal-rust-kernel/index.md
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@@ -337,7 +337,9 @@ Now that we have an executable that does something perceptible, it is time to tu
[section about booting]: #the-boot-process
To make things easy, we created a tool named `bootimage` that automatically downloads a bootloader and combines it with the kernel executable to create a bootable disk image. To install it, execute `cargo install bootimage` in your terminal. After installing, creating a bootimage is as easy as executing `bootimage --target x86_64-blog_os`. The tool also recompiles your kernel using `xargo`, so it will automatically pick up any changes you make.
To make things easy, we created a tool named `bootimage` that automatically downloads a bootloader and combines it with the kernel executable to create a bootable disk image. To install it, execute `cargo install bootimage` in your terminal. If you're on Linux, you probably need to install the `libssl-dev` package before (execute `sudo apt-get install libssl-dev`).
After installing, creating a bootimage is as easy as executing `bootimage --target x86_64-blog_os`. The tool also recompiles your kernel using `xargo`, so it will automatically pick up any changes you make.
After executing the command, you should see a file named `bootimage.bin` in your crate root directory. This file is a bootable disk image. You can boot it in a virtual machine or copy it to an USB drive to boot it on real hardware. (Note that this is not a CD image, which have a different format, so burning it to a CD doesn't work).